Of Maiar orcs in the context of whether orcs were anti-supernatural was not in response to any of your posts.

There are certainly readings to suggest that the Misty Mountain Orcs may well have been under the influence of Sauron (you can find the quotes on this forum for discussion or in a mixture of LOTR and UT)

There are also possibilities of Orcs fitting a particular description being maiar. As it happens Azog does fit the description rather well and would seem a reasonable candidate (again you will find the necessary information in HOME). It is possible that Jackson is seeking to allude to similar concepts without infringing the rights.

The word zombie has not been mentioned in any of the film material. However some form of extended life may possibly connect to the ideas in the previous paragraph.

If you haven't read the material then, in an entirely not perjorative sense, ignorance is inevitable.